Members can assign their own flair. You can set your flair in the box in the upper right on the sidebar according to the format listed here. If your body, affiliation, or title is not one of those listed, and you can't figure out how it should be represented, please contact the mods for assistance.

Please stick with the format. There is a 64 character limit, but if you run out of room, then you probably don’t have enough time to be on Reddit, anyway.